PON Coding Mode Selection by Codeword Length for Error Control
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Solution Overview
Problem
In high-speed passive optical networks, selecting the appropriate coding mode for different services is challenging due to the introduction of various coding modes, leading to issues with error correction and delays.
Innovation Solution
A coding control method and apparatus that acquires the codeword length corresponding to a service and matches it with a preset correspondence table to select the appropriate coding mode, ensuring accurate data coding using the matched mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple coding modes are introduced to support high-speed PON systems (25G/50G), then the adaptability and versatility of the system improve, but the device complexity and difficulty of selecting the appropriate coding mode increase
Solution Approach 1:
The patent uses codeword length as a key parameter to differentiate and select coding modes. By establishing a correspondence between codeword length ranges and specific coding modes (RS coding for shorter lengths, LDPC coding for longer lengths), the system provides a clear parameter-based selection mechanism that reduces complexity while maintaining adaptability to different service requirements
Solution Approach 2:
The patent introduces a coding mode selection mechanism that acts as an intermediary between the service requirements and the actual coding process. This intermediary uses the codeword length as a mediator to automatically determine the appropriate coding mode, eliminating the need for complex manual selection and reducing system complexity
2Device complexity
If fixed codeword length coding is used in 10G PON, then the device complexity is reduced, but the adaptability to different services and future high-speed systems deteriorates
Solution Approach 1:
The patent transitions from a static fixed codeword length system to a dynamic system where the codeword length and coding mode can be adjusted based on service requirements. The correspondence table between codeword length ranges and coding modes enables dynamic adaptation while maintaining operational simplicity through automated selection
3Ease of operation
If inappropriate coding mode is selected for a service, then the ease of operation is maintained, but the reliability and error correction capability deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the codeword length of the service determines the selection of the appropriate coding mode. This feedback loop ensures that the coding mode selected is always suitable for the given service requirements, maintaining both ease of operation through automated selection and reliability through appropriate error correction capabilities
Data Source
AI summary
Provided is a coding control method in a passive optical network (PON). The method includes acquiring data of a service to be coded and a preset codeword length N corresponding to the service to be coded; acquiring a coding mode corresponding to the preset codeword length N in a preset table describing a correspondence between codeword length ranges and coding modes; and coding data of the service by using the coding mode corresponding to the preset codeword length N. Further provided are a coding control apparatus in a PON, a communication device and a storage medium.